Subtract 80/30 from 40/75
1st number: 40/75, 2nd number: 2 20/30
40/75 - 80/30 is -32/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 30 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 75 × 2 = 150,
40/75 = 40 × 2/75 × 2 = 80/150 - Likewise, for the 2nd fraction, since 30 × 5 = 150,
80/30 = 80 × 5/30 × 5 = 400/150 - Subtract the two like fractions:
80/150 - 400/150 = 80 - 400/150 = -320/150 - After reducing the fraction, the answer is -32/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/75-80/30 40/75-80/60 40/75-80/90